Hello and welcome,
It is likely that the plugin is never notified of incoming deposits. If you are using the full node coin adapter with a full node wallet as backend, please consult this article: https://www.dashed-slug.net/howto-debug-an-incoming-deposit-full-node-wallet/
So please follow the troubleshooting guide and let me know if it helped. If not, I can guide you through to debug this.